PS Audio A-100 manual Troubleshooting

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Troubleshooting

Owner’s Reference A-100 Power Amplifier

No sound comes out of the amp

Check the input

Check the rear input selector first

Try another source

If no sound comes out of the A-100 Power Amplifi er there are several areas to check. Either you are not getting an audio signal into the amplifi er, you are not properly connected to the loudspeakers so the audio can get out of the amplifi er, or there is no power from the AC socket.

It is obviously important that the A-100 Power Amplifi er receive a high level signal from the preamplifi er, surround processor or whatever source you are feeding it. One way to determine if this is the case, would be to fi rst go to your loudspeaker. Place your ear near the tweeter and listen for a very slight hiss. If you hear one, chances are good the amp is working fi ne, connected properly at the speakers and you have an input problem. If you suspect an input problem, the fi rst thing to check is the rear panel switch. The switch on the rear of the A-100 Power Amplifi er is an input selector. With a source connected to the preamp and the preamp volume turned up, click the rear mounted input selector on the A-100 Power Amplifi er to both positions and see if this solves the problem.

If not, place the switch to the proper position and replace the interconnects between the preamp and power amp. At last resort, if you suspect an input problem, try another preamp, or plug the output of your CD player or DVD player directly into the A-100 Power Amplifi er. Be careful to choose a CD or DVD with relatively soft music because this will play very loudly.

If you suspect an output problem

If there is a lot of hiss in your speaker

If you have hum or buzz

If you suspect an output problem, use the same technique of placing your ear very close to the speaker’s tweeter while the A-100 Power Amplifi er is turned on. You should hear a very slight amount of hiss from the tweeter. If you do not, check the speaker cable/amp connection. Make sure the amp’s front panel light is on, indicating proper performance.

If there is no sound and you are convinced the A-100 Power Amplifi er has power and its front panel light is lit, contact your dealer, distributor or PS Audio for further assistance.

If there is an excessive amount of hiss or noise from the loudspeaker, it is probably not from the A-100 Power Amplifi er as this amp has extremely low self noise. Turn the amp off, remove the interconnect cables from the A-100 Power Amplifi er and then turn the amplifi er back on. Listen once again to see if the noise has been diminished. If it has, chances are good you either need to replace your preamplifi er with a quieter one or you may need to experiment with better shielded interconnect cables.

If you experience a hum through the speakers this can be caused by several things. The fi rst is the source. If there is an excessive amount of buzz or noise from the loudspeaker, it may be caused by a ground loop, a light dimmer in the home, poor AC power, or any number of causes. The quickest way to determine where to start your search is to simply turn the amp off, disconnect the cables feeding its input, and see if the hum goes away when you turn it back on. If it does, it’s most likely a ground loop or buzz from a dimmer.

The easiest way to fi gure out where ground loop problems lie is by the process of elimination. You need to determine where the hum or buzz is coming from within your system.

If the hum/buzz goes away when you remove the inputs to the power amp, your next step will be

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Troubleshooting 6

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Contents Document Owner’s ReferenceIntroduction Important Safety Instructions IntroductionTable Of Contents Thank you Cool and efficient running Power ratings What you can expectLocation Isolation Power Cables ConditionersGetting Started Getting StartedQuick Start Guide Check for porper polarity Should the unit be on all the time? Placement?Questions and Answers Are there any internal fuses?What voltages can the amp run on? Protection circuitry Does the amp require ventilation?Troubleshooting TroubleshootingFinding a ground loop Try a cheater plug Troubleshooting Conditions WarrantyWarranty RemedyOutside the US Service ServiceIf you have problems Voltage changes Your serial number Your purchase information Date of purchase

A-100 specifications

The PS Audio A-100 is a compact, high-performance Class D amplifier that delivers quality sound and efficiency in a sleek design. Part of PS Audio's mission to make high-quality sound accessible, this amplifier features innovative technologies and an array of characteristics that make it a noteworthy choice for audiophiles.

One of the primary features of the A-100 is its Class D architecture, which is known for its energy efficiency and thermal management. This design allows the amplifier to produce high power while maintaining a small footprint, making it an excellent choice for both small and large setups. With an output power of 100 watts per channel into 8 ohms, the A-100 can drive a variety of speakers with ease, delivering dynamic and robust sound reproduction.

The A-100 incorporates PS Audio's proprietary technologies, including the unique input stage and a custom-designed output stage. These technologies contribute to producing exceptional clarity and detail across all frequencies. The amplifier also features a low-noise power supply that minimizes interference, ensuring a clean and transparent audio signal. This is particularly beneficial for critical listening environments, where every nuance of sound matters.

Another important characteristic of the A-100 is its versatility. It includes various input options, such as RCA and XLR connectors, allowing seamless integration into different audio systems. This ensures compatibility with a wide range of source components, whether it be CD players, digital audio players, or home theater receivers.

The A-100 is also designed with ease of use in mind. It comes equipped with a simple, intuitive user interface that allows for straightforward operation. Moreover, its compact size means it can be easily placed in virtually any setup, from a dedicated audio room to a casual living space.

In addition to performance, PS Audio places great emphasis on build quality. The A-100 features a sturdy chassis that minimizes vibrations and interference, further ensuring high fidelity sound reproduction. Its modern aesthetic, combined with high-end materials, makes it an attractive addition to any audio setup.

In summary, the PS Audio A-100 amplifier is an excellent choice for those seeking high-quality sound in a compact form factor. With its advanced Class D technology, versatile connectivity options, and robust build quality, it stands out as a highly efficient and reliable amplifier in the modern audio landscape. Whether for casual listening or critical audiophile applications, the A-100 consistently delivers outstanding performance, making it a valuable asset for any audio enthusiast.
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